title: Clinical review: Reappraising the concept of immediate defibrillatory attempts for out-of-hospital ventricular fibrillation.
mesh_terms: D022561:Advanced Cardiac Life Support; D016887:Cardiopulmonary Resuscitation; D004554:Electric Countershock / Q000706:statistics & numerical data*; D004632:Emergency Medical Services; D006323:Heart Arrest; D006801:Humans; D015996:Survival Rate; D014481:United States; D014693:Ventricular Fibrillation / Q000628:therapy*